./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-theta/unwind2-nondet.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-theta/unwind2-nondet.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 797a9e1bf9dc9387a2e0877719131f75c1f5b0797aa4bcc7c94038568bc56c2d --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:46:55,399 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:46:55,454 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:46:55,460 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:46:55,461 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:46:55,477 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:46:55,478 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:46:55,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:46:55,478 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:46:55,478 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:46:55,479 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:46:55,479 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:46:55,480 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:46:55,480 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:46:55,480 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:46:55,480 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:46:55,480 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:46:55,480 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:46:55,481 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:46:55,481 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:46:55,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:46:55,481 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:46:55,481 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:46:55,481 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:46:55,481 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:46:55,481 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:46:55,481 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:46:55,481 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:46:55,481 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:46:55,481 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:46:55,482 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:46:55,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:46:55,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:46:55,482 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:46:55,482 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:46:55,482 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:46:55,482 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:46:55,482 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:46:55,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:46:55,482 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:46:55,482 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:46:55,483 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:46:55,483 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:46:55,483 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 797a9e1bf9dc9387a2e0877719131f75c1f5b0797aa4bcc7c94038568bc56c2d [2025-02-06 04:46:55,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:46:55,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:46:55,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:46:55,703 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:46:55,703 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:46:55,704 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/unwind2-nondet.i [2025-02-06 04:46:56,836 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c014ed779/a9661ac179aa46889da6bb7839598225/FLAG3d6a9e975 [2025-02-06 04:46:57,104 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:46:57,104 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind2-nondet.i [2025-02-06 04:46:57,119 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c014ed779/a9661ac179aa46889da6bb7839598225/FLAG3d6a9e975 [2025-02-06 04:46:57,131 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c014ed779/a9661ac179aa46889da6bb7839598225 [2025-02-06 04:46:57,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:46:57,134 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:46:57,135 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:46:57,135 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:46:57,137 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:46:57,138 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:46:57" (1/1) ... [2025-02-06 04:46:57,138 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12fdff9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57, skipping insertion in model container [2025-02-06 04:46:57,138 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:46:57" (1/1) ... [2025-02-06 04:46:57,175 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:46:57,420 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind2-nondet.i[33026,33039] [2025-02-06 04:46:57,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:46:57,447 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:46:57,488 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind2-nondet.i[33026,33039] [2025-02-06 04:46:57,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:46:57,521 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:46:57,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57 WrapperNode [2025-02-06 04:46:57,523 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:46:57,524 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:46:57,524 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:46:57,524 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:46:57,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57" (1/1) ... [2025-02-06 04:46:57,536 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57" (1/1) ... [2025-02-06 04:46:57,551 INFO L138 Inliner]: procedures = 169, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2025-02-06 04:46:57,552 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:46:57,553 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:46:57,553 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:46:57,553 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:46:57,559 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57" (1/1) ... [2025-02-06 04:46:57,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57" (1/1) ... [2025-02-06 04:46:57,562 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57" (1/1) ... [2025-02-06 04:46:57,577 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-06 04:46:57,577 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57" (1/1) ... [2025-02-06 04:46:57,577 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57" (1/1) ... [2025-02-06 04:46:57,581 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57" (1/1) ... [2025-02-06 04:46:57,582 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57" (1/1) ... [2025-02-06 04:46:57,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57" (1/1) ... [2025-02-06 04:46:57,588 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57" (1/1) ... [2025-02-06 04:46:57,589 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:46:57,590 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:46:57,590 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:46:57,590 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:46:57,591 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57" (1/1) ... [2025-02-06 04:46:57,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:46:57,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:57,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 04:46:57,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 04:46:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:46:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2025-02-06 04:46:57,635 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2025-02-06 04:46:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2025-02-06 04:46:57,635 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2025-02-06 04:46:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:46:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:46:57,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:46:57,636 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 04:46:57,735 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:46:57,737 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:46:57,838 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:46:57,838 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:46:57,925 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:46:57,925 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:46:57,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:46:57 BoogieIcfgContainer [2025-02-06 04:46:57,925 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:46:57,927 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:46:57,927 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:46:57,931 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:46:57,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:46:57" (1/3) ... [2025-02-06 04:46:57,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e3c246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:46:57, skipping insertion in model container [2025-02-06 04:46:57,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:57" (2/3) ... [2025-02-06 04:46:57,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e3c246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:46:57, skipping insertion in model container [2025-02-06 04:46:57,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:46:57" (3/3) ... [2025-02-06 04:46:57,932 INFO L128 eAbstractionObserver]: Analyzing ICFG unwind2-nondet.i [2025-02-06 04:46:57,945 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:46:57,946 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unwind2-nondet.i that has 3 procedures, 27 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-02-06 04:46:57,946 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:46:57,986 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-06 04:46:58,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 30 transitions, 74 flow [2025-02-06 04:46:58,026 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2025-02-06 04:46:58,028 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:46:58,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 4/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2025-02-06 04:46:58,030 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 30 transitions, 74 flow [2025-02-06 04:46:58,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 61 flow [2025-02-06 04:46:58,040 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:46:58,051 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@62c9df08, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:46:58,052 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-02-06 04:46:58,057 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:46:58,059 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-02-06 04:46:58,060 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:46:58,060 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:58,060 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:58,061 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:46:58,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:58,068 INFO L85 PathProgramCache]: Analyzing trace with hash 362634887, now seen corresponding path program 1 times [2025-02-06 04:46:58,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:58,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792861890] [2025-02-06 04:46:58,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:58,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:58,137 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 04:46:58,155 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 04:46:58,156 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:58,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:46:58,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:58,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792861890] [2025-02-06 04:46:58,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792861890] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:46:58,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:46:58,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 04:46:58,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493346421] [2025-02-06 04:46:58,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:46:58,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 04:46:58,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:58,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 04:46:58,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-06 04:46:58,480 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2025-02-06 04:46:58,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 61 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:46:58,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:58,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2025-02-06 04:46:58,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:58,860 INFO L124 PetriNetUnfolderBase]: 381/717 cut-off events. [2025-02-06 04:46:58,860 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2025-02-06 04:46:58,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 717 events. 381/717 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3560 event pairs, 32 based on Foata normal form. 70/658 useless extension candidates. Maximal degree in co-relation 1304. Up to 185 conditions per place. [2025-02-06 04:46:58,866 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 75 selfloop transitions, 18 changer transitions 4/101 dead transitions. [2025-02-06 04:46:58,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 101 transitions, 429 flow [2025-02-06 04:46:58,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 04:46:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-02-06 04:46:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2025-02-06 04:46:58,875 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-02-06 04:46:58,876 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 61 flow. Second operand 11 states and 176 transitions. [2025-02-06 04:46:58,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 101 transitions, 429 flow [2025-02-06 04:46:58,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 101 transitions, 413 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 04:46:58,884 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 167 flow [2025-02-06 04:46:58,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=167, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2025-02-06 04:46:58,888 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2025-02-06 04:46:58,889 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 167 flow [2025-02-06 04:46:58,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:46:58,889 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:58,889 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:58,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:46:58,889 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:46:58,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:58,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1643251011, now seen corresponding path program 1 times [2025-02-06 04:46:58,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:58,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468588152] [2025-02-06 04:46:58,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:58,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:58,896 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 04:46:58,900 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 04:46:58,900 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:58,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:46:59,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:59,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468588152] [2025-02-06 04:46:59,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468588152] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:46:59,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643969432] [2025-02-06 04:46:59,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:59,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:59,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:59,018 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:46:59,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 04:46:59,060 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 04:46:59,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 04:46:59,067 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:59,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:59,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 04:46:59,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:46:59,135 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 04:46:59,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643969432] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:46:59,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 04:46:59,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2025-02-06 04:46:59,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085670] [2025-02-06 04:46:59,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:46:59,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 04:46:59,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:59,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 04:46:59,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-06 04:46:59,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2025-02-06 04:46:59,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 167 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:46:59,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:59,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2025-02-06 04:46:59,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:59,343 INFO L124 PetriNetUnfolderBase]: 345/702 cut-off events. [2025-02-06 04:46:59,343 INFO L125 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2025-02-06 04:46:59,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1811 conditions, 702 events. 345/702 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3730 event pairs, 68 based on Foata normal form. 22/623 useless extension candidates. Maximal degree in co-relation 1636. Up to 167 conditions per place. [2025-02-06 04:46:59,348 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 72 selfloop transitions, 14 changer transitions 4/97 dead transitions. [2025-02-06 04:46:59,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 97 transitions, 502 flow [2025-02-06 04:46:59,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 04:46:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 04:46:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2025-02-06 04:46:59,349 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.562962962962963 [2025-02-06 04:46:59,350 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 167 flow. Second operand 9 states and 152 transitions. [2025-02-06 04:46:59,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 97 transitions, 502 flow [2025-02-06 04:46:59,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 97 transitions, 501 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:46:59,356 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 239 flow [2025-02-06 04:46:59,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=239, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2025-02-06 04:46:59,357 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2025-02-06 04:46:59,357 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 239 flow [2025-02-06 04:46:59,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:46:59,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:59,357 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:59,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 04:46:59,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:59,561 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:46:59,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:59,562 INFO L85 PathProgramCache]: Analyzing trace with hash 224001577, now seen corresponding path program 1 times [2025-02-06 04:46:59,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:59,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400878363] [2025-02-06 04:46:59,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:59,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:59,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 04:46:59,570 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 04:46:59,570 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:59,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:46:59,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:59,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400878363] [2025-02-06 04:46:59,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400878363] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:46:59,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:46:59,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:46:59,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211908299] [2025-02-06 04:46:59,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:46:59,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 04:46:59,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:59,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 04:46:59,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 04:46:59,640 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-02-06 04:46:59,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:46:59,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:59,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-02-06 04:46:59,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:59,801 INFO L124 PetriNetUnfolderBase]: 396/836 cut-off events. [2025-02-06 04:46:59,801 INFO L125 PetriNetUnfolderBase]: For 952/954 co-relation queries the response was YES. [2025-02-06 04:46:59,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2275 conditions, 836 events. 396/836 cut-off events. For 952/954 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4734 event pairs, 87 based on Foata normal form. 2/753 useless extension candidates. Maximal degree in co-relation 2090. Up to 290 conditions per place. [2025-02-06 04:46:59,805 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 64 selfloop transitions, 15 changer transitions 1/88 dead transitions. [2025-02-06 04:46:59,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 88 transitions, 640 flow [2025-02-06 04:46:59,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 04:46:59,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 04:46:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2025-02-06 04:46:59,806 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-02-06 04:46:59,806 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 239 flow. Second operand 7 states and 112 transitions. [2025-02-06 04:46:59,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 88 transitions, 640 flow [2025-02-06 04:46:59,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 628 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 04:46:59,813 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 314 flow [2025-02-06 04:46:59,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2025-02-06 04:46:59,814 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2025-02-06 04:46:59,814 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 314 flow [2025-02-06 04:46:59,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:46:59,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:59,814 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:59,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 04:46:59,814 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:46:59,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:59,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1645916315, now seen corresponding path program 1 times [2025-02-06 04:46:59,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:59,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086261692] [2025-02-06 04:46:59,815 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:59,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:59,819 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 04:46:59,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 04:46:59,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:59,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:46:59,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:59,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086261692] [2025-02-06 04:46:59,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086261692] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:46:59,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472726835] [2025-02-06 04:46:59,913 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:59,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:59,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:59,915 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:46:59,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 04:46:59,952 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 04:46:59,960 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 04:46:59,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:59,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:59,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 04:46:59,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:47:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:47:00,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:47:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:47:00,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472726835] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:47:00,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:47:00,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-02-06 04:47:00,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27000139] [2025-02-06 04:47:00,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:47:00,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 04:47:00,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:47:00,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 04:47:00,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-02-06 04:47:00,220 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2025-02-06 04:47:00,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 314 flow. Second operand has 15 states, 15 states have (on average 7.533333333333333) internal successors, (113), 15 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:47:00,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:47:00,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2025-02-06 04:47:00,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:47:00,646 INFO L124 PetriNetUnfolderBase]: 774/1416 cut-off events. [2025-02-06 04:47:00,646 INFO L125 PetriNetUnfolderBase]: For 2073/2089 co-relation queries the response was YES. [2025-02-06 04:47:00,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4643 conditions, 1416 events. 774/1416 cut-off events. For 2073/2089 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7888 event pairs, 108 based on Foata normal form. 2/1281 useless extension candidates. Maximal degree in co-relation 4326. Up to 357 conditions per place. [2025-02-06 04:47:00,654 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 99 selfloop transitions, 22 changer transitions 37/164 dead transitions. [2025-02-06 04:47:00,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 164 transitions, 1300 flow [2025-02-06 04:47:00,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-06 04:47:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-06 04:47:00,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 188 transitions. [2025-02-06 04:47:00,656 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48205128205128206 [2025-02-06 04:47:00,656 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 314 flow. Second operand 13 states and 188 transitions. [2025-02-06 04:47:00,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 164 transitions, 1300 flow [2025-02-06 04:47:00,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 164 transitions, 1279 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-02-06 04:47:00,692 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 422 flow [2025-02-06 04:47:00,692 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=422, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2025-02-06 04:47:00,693 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2025-02-06 04:47:00,693 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 422 flow [2025-02-06 04:47:00,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.533333333333333) internal successors, (113), 15 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:47:00,693 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:47:00,693 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:47:00,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 04:47:00,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:47:00,894 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:47:00,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:47:00,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1464508544, now seen corresponding path program 1 times [2025-02-06 04:47:00,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:47:00,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151460879] [2025-02-06 04:47:00,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:47:00,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:47:00,901 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 04:47:00,909 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 04:47:00,909 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:47:00,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:47:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:47:00,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:47:00,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151460879] [2025-02-06 04:47:00,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151460879] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:47:00,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:47:00,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 04:47:00,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470690095] [2025-02-06 04:47:00,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:47:00,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 04:47:00,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:47:00,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 04:47:00,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-06 04:47:00,981 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-02-06 04:47:00,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 422 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:47:00,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:47:00,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-02-06 04:47:00,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:47:01,168 INFO L124 PetriNetUnfolderBase]: 552/1173 cut-off events. [2025-02-06 04:47:01,168 INFO L125 PetriNetUnfolderBase]: For 2557/2559 co-relation queries the response was YES. [2025-02-06 04:47:01,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4530 conditions, 1173 events. 552/1173 cut-off events. For 2557/2559 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7158 event pairs, 101 based on Foata normal form. 18/1142 useless extension candidates. Maximal degree in co-relation 4357. Up to 558 conditions per place. [2025-02-06 04:47:01,177 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 58 selfloop transitions, 15 changer transitions 0/82 dead transitions. [2025-02-06 04:47:01,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 82 transitions, 750 flow [2025-02-06 04:47:01,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:47:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:47:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2025-02-06 04:47:01,179 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2025-02-06 04:47:01,179 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 422 flow. Second operand 6 states and 92 transitions. [2025-02-06 04:47:01,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 82 transitions, 750 flow [2025-02-06 04:47:01,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 82 transitions, 693 flow, removed 11 selfloop flow, removed 7 redundant places. [2025-02-06 04:47:01,197 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 419 flow [2025-02-06 04:47:01,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=419, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2025-02-06 04:47:01,198 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2025-02-06 04:47:01,199 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 419 flow [2025-02-06 04:47:01,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:47:01,199 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:47:01,199 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:47:01,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 04:47:01,199 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-02-06 04:47:01,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:47:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash 881808862, now seen corresponding path program 1 times [2025-02-06 04:47:01,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:47:01,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589323574] [2025-02-06 04:47:01,200 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:47:01,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:47:01,205 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 04:47:01,210 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 04:47:01,210 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:47:01,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:47:01,210 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 04:47:01,213 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 04:47:01,221 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 04:47:01,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:47:01,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:47:01,231 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 04:47:01,232 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 04:47:01,232 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2025-02-06 04:47:01,233 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2025-02-06 04:47:01,234 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2025-02-06 04:47:01,234 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2025-02-06 04:47:01,234 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2025-02-06 04:47:01,234 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2025-02-06 04:47:01,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 04:47:01,234 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2025-02-06 04:47:01,259 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-02-06 04:47:01,259 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-06 04:47:01,264 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.02 04:47:01 BasicIcfg [2025-02-06 04:47:01,264 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-06 04:47:01,265 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-06 04:47:01,265 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-06 04:47:01,265 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-06 04:47:01,266 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:46:57" (3/4) ... [2025-02-06 04:47:01,266 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-02-06 04:47:01,303 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 7. [2025-02-06 04:47:01,333 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-06 04:47:01,335 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-06 04:47:01,335 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-06 04:47:01,336 INFO L158 Benchmark]: Toolchain (without parser) took 4201.98ms. Allocated memory was 142.6MB in the beginning and 176.2MB in the end (delta: 33.6MB). Free memory was 111.2MB in the beginning and 59.9MB in the end (delta: 51.4MB). Peak memory consumption was 86.3MB. Max. memory is 16.1GB. [2025-02-06 04:47:01,337 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 124.2MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:47:01,337 INFO L158 Benchmark]: CACSL2BoogieTranslator took 388.80ms. Allocated memory is still 142.6MB. Free memory was 110.7MB in the beginning and 90.8MB in the end (delta: 19.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 04:47:01,337 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.33ms. Allocated memory is still 142.6MB. Free memory was 90.8MB in the beginning and 89.4MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 04:47:01,339 INFO L158 Benchmark]: Boogie Preprocessor took 36.67ms. Allocated memory is still 142.6MB. Free memory was 89.4MB in the beginning and 87.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-06 04:47:01,339 INFO L158 Benchmark]: IcfgBuilder took 335.66ms. Allocated memory is still 142.6MB. Free memory was 87.9MB in the beginning and 67.2MB in the end (delta: 20.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-06 04:47:01,339 INFO L158 Benchmark]: TraceAbstraction took 3337.18ms. Allocated memory was 142.6MB in the beginning and 176.2MB in the end (delta: 33.6MB). Free memory was 66.7MB in the beginning and 65.8MB in the end (delta: 860.4kB). Peak memory consumption was 36.0MB. Max. memory is 16.1GB. [2025-02-06 04:47:01,340 INFO L158 Benchmark]: Witness Printer took 70.32ms. Allocated memory is still 176.2MB. Free memory was 65.8MB in the beginning and 59.9MB in the end (delta: 6.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-06 04:47:01,341 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 201.3MB. Free memory is still 124.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 388.80ms. Allocated memory is still 142.6MB. Free memory was 110.7MB in the beginning and 90.8MB in the end (delta: 19.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.33ms. Allocated memory is still 142.6MB. Free memory was 90.8MB in the beginning and 89.4MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.67ms. Allocated memory is still 142.6MB. Free memory was 89.4MB in the beginning and 87.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 335.66ms. Allocated memory is still 142.6MB. Free memory was 87.9MB in the beginning and 67.2MB in the end (delta: 20.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 3337.18ms. Allocated memory was 142.6MB in the beginning and 176.2MB in the end (delta: 33.6MB). Free memory was 66.7MB in the beginning and 65.8MB in the end (delta: 860.4kB). Peak memory consumption was 36.0MB. Max. memory is 16.1GB. * Witness Printer took 70.32ms. Allocated memory is still 176.2MB. Free memory was 65.8MB in the beginning and 59.9MB in the end (delta: 6.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 753]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L754] 0 int _N; [L755] 0 atomic_int limit; [L775] 0 _N = __VERIFIER_nondet_int() [L776] CALL 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L750] COND FALSE 0 !(!cond) [L776] RET 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L777] 0 pthread_t t1, t2; [L778] FCALL, FORK 0 pthread_create(&t1, 0, f1, 0) VAL [_N=0, limit=0, t1=-1] [L757] 1 int i, bound; [L758] 1 int lim = _N; VAL [\old(arg)={0:0}, _N=0, arg={0:0}, lim=0, limit=0] [L779] FCALL, FORK 0 pthread_create(&t2, 0, f2, 0) VAL [_N=0, limit=0, t1=-1, t2=0] [L766] 2 int i, bound; [L767] 2 int lim = _N + 1; VAL [\old(arg)={0:0}, _N=0, arg={0:0}, lim=1, limit=0] [L768] 2 limit = lim VAL [\old(arg)={0:0}, _N=0, arg={0:0}, lim=1, limit=1] [L759] 1 limit = lim VAL [\old(arg)={0:0}, _N=0, arg={0:0}, lim=0, limit=0] [L769] 2 bound = limit [L770] 2 i = 0 VAL [\old(arg)={0:0}, _N=0, arg={0:0}, bound=0, i=0, lim=1, limit=0] [L770] COND FALSE 2 !(i < bound) [L771] CALL 2 __VERIFIER_assert(i == lim) [L753] COND TRUE 2 !expression VAL [\old(expression)=0, _N=0, expression=0, limit=0] [L753] 2 reach_error() VAL [\old(expression)=0, _N=0, expression=0, limit=0] - UnprovableResult [Line: 778]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 779]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 753]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 47 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.2s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 485 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 482 mSDsluCounter, 46 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 41 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1007 IncrementalHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 5 mSDtfsCounter, 1007 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=422occurred in iteration=4, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 320 SizeOfPredicates, 11 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 1/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2025-02-06 04:47:01,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE